PDF malware analysis — malicious · 1ef086a485798511

MALICIOUS

PDF

14.7 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: b6995485ee37ea2dd8bb25fb0962eec5 SHA-1: dbf2e9c8b03aa1f81ca4dc680c956df03e89d506 SHA-256: 1ef086a4857985113ae3d961f184d1a5d0ec60b39749420f5f5fb2e6a4f1439e

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF sample contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of an eval() call (PDF_EVAL) and ML_NYX_PDF_MALICIOUS, along with ClamAV detection as Pdf.Exploit.Agent-36118, strongly suggests exploitation of a vulnerability to execute arbitrary code. The script's obfuscated nature and the use of eval() point towards a downloader attempting to fetch and execute a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Agent-36118 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36118
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_000.js` `372957bbb1aa148f6efe38650dd5859b03ba8a4fa507e2e25c208b4cc6e273a2`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13464 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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